Re: [PATCH 16/22] t5326: test multi-pack bitmap behavior

> +test_expect_success 'clone with bitmaps enabled' '
> +	git clone --no-local --bare . clone-reverse-delta.git &&
> +	test_when_finished "rm -fr clone-reverse-delta.git" &&
> +
> +	git rev-parse HEAD >expect &&
> +	git --git-dir=clone-reverse-delta.git rev-parse HEAD >actual &&
> +	test_cmp expect actual
> +'

> +bitmap_reuse_tests() {
> +	from=$1
> +	to=$2
> +
> +	test_expect_success "setup pack reuse tests ($from -> $to)" '
> +		rm -fr repo &&
> +		git init repo &&
> +		(
> +			cd repo &&
> +			test_commit_bulk 16 &&
> +			git tag old-tip &&
> +
> +			git config core.multiPackIndex true &&
> +			if test "MIDX" = "$from"
> +			then
> +				GIT_TEST_MULTI_PACK_INDEX=0 git repack -Ad &&
> +				git multi-pack-index write --bitmap
> +			else
> +				GIT_TEST_MULTI_PACK_INDEX=0 git repack -Adb
> +			fi
> +		)
> +	'
> +
> +	test_expect_success "build bitmap from existing ($from -> $to)" '
> +		(
> +			cd repo &&
> +			test_commit_bulk --id=further 16 &&
> +			git tag new-tip &&
> +
> +			if test "MIDX" = "$to"
> +			then
> +				GIT_TEST_MULTI_PACK_INDEX=0 git repack -d &&
> +				git multi-pack-index write --bitmap
> +			else
> +				GIT_TEST_MULTI_PACK_INDEX=0 git repack -Adb
> +			fi
> +		)
> +	'
> +
> +	test_expect_success "verify resulting bitmaps ($from -> $to)" '
> +		(
> +			cd repo &&
> +			git for-each-ref &&
> +			git rev-list --test-bitmap refs/tags/old-tip &&
> +			git rev-list --test-bitmap refs/tags/new-tip
> +		)
> +	'
> +}
> +
> +bitmap_reuse_tests 'pack' 'MIDX'
> +bitmap_reuse_tests 'MIDX' 'pack'
> +bitmap_reuse_tests 'MIDX' 'MIDX'

> +test_expect_success 'pack.preferBitmapTips' '
> +	git init repo &&
> +	test_when_finished "rm -fr repo" &&
> +	(
> +		cd repo &&
> +
> +		test_commit_bulk --message="%s" 103 &&
> +
> +		git log --format="%H" >commits.raw &&
> +		sort <commits.raw >commits &&
> +
> +		git log --format="create refs/tags/%s %H" HEAD >refs &&
> +		git update-ref --stdin <refs &&
> +
> +		git multi-pack-index write --bitmap &&
> +		test_path_is_file $midx &&
> +		test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
> +
> +		test-tool bitmap list-commits | sort >bitmaps &&
> +		comm -13 bitmaps commits >before &&
> +		test_line_count = 1 before &&
> +
> +		perl -ne "printf(\"create refs/tags/include/%d \", $.); print" \
> +			<before | git update-ref --stdin &&
> +
> +		rm -fr $midx-$(midx_checksum $objdir).bitmap &&
> +		rm -fr $midx-$(midx_checksum $objdir).rev &&
> +		rm -fr $midx &&
> +
> +		git -c pack.preferBitmapTips=refs/tags/include \
> +			multi-pack-index write --bitmap &&
> +		test-tool bitmap list-commits | sort >bitmaps &&
> +		comm -13 bitmaps commits >after &&
> +
> +		! test_cmp before after
> +	)
> +'